Q. If both sides of a light bulb are at the same voltage, what happens to the light bulb? answer choices It glows very brightly There is no light The brightness of the light will vary over time The bulb will explode
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it glows very brightly
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When two voltages with similar currents are compared, they cannot be the same bulb in both situations. This means you're comparing two different bulbs, and there's no way of knowing which one will be brighter because different bulbs have variable luminous efficacy, or light per unit power. For example, a bulb with a longer filament can be built and operated at a lower temperature, producing less light but lasting longer because the filament is run cooler.
If two bulbs with comparable efficacy are compared, the bulb that is run at a higher voltage will be brighter due to its higher power dissipation.
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